Bug 2266828 (CVE-2021-46973)

Summary:	CVE-2021-46973 kernel: net: qrtr: Avoid potential use after free in MHI send
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sidakwo, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.10.35, kernel 5.11.19, kernel 5.12.2, kernel 5.13	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free flaw was found in the Linux kernel. This issue may lead to compromised availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2266829
Bug Blocks:	2266839

Description Avinash Hanwate 2024-02-29 07:01:51 UTC

In the Linux kernel, the following vulnerability has been resolved:

net: qrtr: Avoid potential use after free in MHI send

The Linux kernel CVE team has assigned CVE-2021-46973 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022721-CVE-2021-46973-20ce@gregkh/T/#u

Comment 1 Avinash Hanwate 2024-02-29 07:02:30 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266829]

Comment 5 Justin M. Forbes 2024-03-01 22:24:30 UTC

This was fixed for Fedora with the 5.11.19 stable kernel updates.

Comment 6 Alex 2024-06-09 15:17:52 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46973 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is approximation based on flags SIMPLEFIX UAF SKB  ; these flags parsed automatically based on patche data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.